Heating system for intake manifolds and circuit for same



June 14,1927. 1,632,139

H. S. MATTISON HEATING SYSTEM FOR INTAKE MANIFOLDS AND CIRCUIT FOR SAME Filed Oct. 29, 1924 Show...

Patented June 14, 1927.

UNITED STATES PATENT OFFICE.

HANS S. MATTISON, OF LA GROSSE, WISCONSIN, ASSIGNOR, BY DIRECT AND MESNE AS- SIGNMENTS, TO NEW ERA PRODUCTS OOIY'LEAIIY, IVIINNEAPOLIS, IYIINNESOTA, A

MASSACHUSETTS TRUST ASSOCIATION.

HEATING SYSTEM FOR INTAKE MANIEOLDS AND CIRCUIT FOR SAME.

Application filed October as, 1924.

One object of my invention is to provide a heating device to be used in connection with an intake manifold for heating gases passing through the manifold and for straining the gases through heated wires.

' Another object of my invention is to provide improved means for positioning a heating coil on the interior of an intake manifold.

Another object is to provide a coil and circuit such that the coil will deliver the greater amount of heat when the motor to which it is attached is being started and a lesser but suflicient amount of heat for running conditions when the motor is running.

With these and incidental objects in view, the invention consists of certain novel features of construction and combination of parts, the essential elements of which are hereinafter described with reference to the drawing which accompanies and forms a part of this specification.

In the drawing, Figure 1 is a plan view of my improved heater and showing 011011113 arrangements therefor.

As shown in the drawing the heater is comprised of a gasket 1, adapted to be placed between a carburetor and an intake manifold of a gasoline engine, apertures 2 and 3 being provided for taking the ordinary fastening bolts.

This gasket may be made of metal, but I prefer a substance on the order of bakelite or some insulating material, and the large aperture 4, which is in line with the intake manifold has a circumferential recess therearound, as shown at 5.

When a motor is first being started a great deal more heat should be applied to the gases than is necessary when the motor is running and for that reason I have provided a circuit that will insure such operation of the heating coil.

As shown in the drawing, the battery 1) is connected by wires 10 and 11 to the contact 12 adapted to contact with a contact plate 12 on the free end of a switch bar S, pivoted at S, when the switch bar S is turned up manually against contact 12 by any suitable means (not shown). A wire 18 leads from the pivoted end S of bar S to a contact terminal T fixed in the usual manner to the gasket 1 and a conductor 14; connects this Serial No. 746,631.

terminal T to the center of'the coil 9, the upper half of which is designated by the reference numeral 15, and has its end connected to a terminal T fixed to gasket 1.

The terminal T is connected by wire 16, the pivot end of a switch bar S connected by a link L to the bar S, the bars S and thus linked, constituting a double pale switch of ordinary construction. When the engine is at rest, the bar S rests on the contact 17 and link L holds bar S with conplate 12 separated from contact 12.

The terminal T fixed on plate 1 and connected to the lower half of coil 9 is connected by wire 18 to the contact point 17. The contacts 17 and 17 are fixed relative to each other and the bar S as previously described rests normally on contact 17. It is only when the double pole switch is raised manually or otherwise, that contact is 'made be tween plate 12 and contact 12 and bar S contacts with point 17. The wire 18 is also connected by wire 19 to the ground 20, and a wire 22 tapped to wire 19 serves as a return line to battery B.

A wire 23 connects contact point 17 to one terminal of the ignition switch 25 and a wire 24: connects the other terminal of this switch 25 through ammeter A to the battery wire 10.

In operation, as soon as the motor starter is operated, the two pole switch is moved upward manually so that bar S leaves contact 17 and contacts with contact point 17, and the plate 12 contacts with contact point 12. In this condition the circuit is through battery B, wires 10 and 11, contact 12, plate 12, bar S, wire 13, terminal T, wire 14; upper half 15 of coil 9, terminal T wire 16, con tact 17, and wires 18 and 19 to ground 20 or return wire 22 to battery B, wire 22 being the ground wire for the battery. The current also flows from wire 1A through lower half 21 of coil 9 to terminal S and wires 18 and 19 to ground 20. During the operation of the starter motor, or as long as the double pole switch is closed, the battery current under full voltage passes in parallel through the two halves of the coil and hence gives the maximum heating effect of the coil, which is, of course, highly desirable at the starting of the motor.

As soon as the engine is running independently of the starter motor, the two pole switch may be released, bar S thendrops into contact with contact 17 and away from contact 17 and bar S leaves contact 12. The circuit then is: through battery B, wires 10 and 24, ammeter A, switch 25, wire 23 con tact 17, bar S wire 16, terminal T the two halves of coils 15 and 21 in series, terminal T and wires 18 and 19 to ground 20.

The switch S is obviously between the contacts 17 and 17; and the link L connects the switches S and S to form a double pole switcl'r adapted'to make contact with contacts 12 and-17 only when the compound switch is operated manually, the combined link and switches thus l'orming a doublepole double throw switch.

The connections to the starting motor and switches, ignition circuits, and generator are of the ordinary type but do not alter nor are they altered by the circuit arrangements for this heater.

Vhile I have described my invention and illustrated itin one particular design, I do not wish it understood that I limit myself to this construction, as it is evident that the application of the invention may be varied in many ways within the scope of the following claim:

Claim:

The combination with a sectional heating coil positioned in the line between the carburetor and intake manifold of an internal combustion engine, an electric circuit including said coil and a tap connected to the divisional point of said coil,'and a doublethrow double-pole switch in said circuit adapted when in one contact position to cause energy to flow through the two sections of said coil in parallel, and when in the other contact position to cause current to fiow through said sections in series.

HANS S. MATTISON. 

